Vulnerability in Libssh2
CVE-2026-58051
libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free operating on an unini…
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H.
Affected products
- Libssh2 — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (exploit, third-party-advisory)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-58051?
- CVE-2026-58051 is a medium-severity vulnerability in Libssh2, classified under Use of Uninitialized Resource. CVSS score: 6.5/10. Published 2026-06-28.
- How severe is CVE-2026-58051?
- Medium severity. CVSS v3 base score is 6.5 out of 10.